Low-Temperature Heat Capacity and Thermodynamic Parameters of γ-Aminobutyric Acid Full article
Journal |
Journal of Thermal Analysis and Calorimetry
ISSN: 1388-6150 , E-ISSN: 1572-8943 |
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Output data | Year: 2012, Volume: 111, Number: 3, Pages: 2059-2062 Pages count : 4 DOI: 10.1007/s10973-012-2405-4 | ||||
Tags | Amino acids Heat capacity Low temperatures Thermodynamic functions | ||||
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Abstract:
Thermodynamic properties of γ-aminobutyric acid were studied in the temperature interval from 5.7 to 300 K using a vacuum adiabatic calorimeter. The curve C p (T) in the mentioned temperature interval is S-shaped without any anomalies. Based on the smoothed values of heat capacity, the calorimetric entropy S0m(T)−S0m(0) and the difference in the enthalpies H0m(T)−H0m(0) were calculated and tabulated. At the standard temperature 298.15 K, these values are equal to 158.1 ± 0.3 J K−1 mol−1 and 23020 ± 50 J mol−1, respectively. At temperatures from 5 to 10 K, the function C p (T) was found to obey the Debye law C = AT 3. Contrary to what has been supposed previously, the empirical Parks–Huffman rule for estimating entropy in the homologous series was shown to be not valid for the series glycine–β-alanine–γ-aminobutyric acid.
Cite:
Paukov I.E.
, Kovalevskaya Y.A.
, Boldyreva E.V.
Low-Temperature Heat Capacity and Thermodynamic Parameters of γ-Aminobutyric Acid
Journal of Thermal Analysis and Calorimetry. 2012. V.111. N3. P.2059-2062. DOI: 10.1007/s10973-012-2405-4 WOS Scopus РИНЦ
Low-Temperature Heat Capacity and Thermodynamic Parameters of γ-Aminobutyric Acid
Journal of Thermal Analysis and Calorimetry. 2012. V.111. N3. P.2059-2062. DOI: 10.1007/s10973-012-2405-4 WOS Scopus РИНЦ
Dates:
Submitted: | Feb 22, 2012 |
Accepted: | Mar 12, 2012 |
Published online: | Apr 4, 2012 |
Published print: | Mar 1, 2013 |
Identifiers:
Web of science | WOS:000315298800052 |
Scopus | 2-s2.0-84881480697 |
Elibrary | 23966060 |
Chemical Abstracts | 2013:293105 |
Chemical Abstracts (print) | 159:186355 |
OpenAlex | W1984705804 |